Question

Uso del parentesis en la aritmetica

Resolver:


-9(-11)

-8(21)

6(-7)(-8)

9(3)(-2)

3+4-(2+5)

(6+5) + (-3+4)

Answer 1

Ley de signos:
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$+*+=+ \\ \\ +*-=- \\ \\ -*-=+ \\ \\ -*+=-$
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En una suma o resta se coge el signo del mayor.
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-9(-11)=+99

-8(21)=-168

6(-7)(-8)=+338

9(3)(-2)=-54

3+4-(2+5)=7-(7)=0

(6+5) + (-3+4)=11+(+1)=+12


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